pgsql: Fix testing of parallel-safety of scan/join target.

Fix testing of parallel-safety of scan/join target.

In commit 960df2a971 ("Correctly assess parallel-safety of tlists when
SRFs are used."), the testing of scan/join target was done incorrectly,
which caused a plan-quality problem.  Backpatch through to v11 where
the aforementioned commit went in, since this is a regression from v10.

Author: Etsuro Fujita
Reviewed-by: Robert Haas and Tom Lane
Discussion: https://postgr.es/m/5C75303E.8020303@lab.ntt.co.jp

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/fd1eaf9202dc3bbd657aa1f46b787329173b261c

Modified Files
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src/backend/optimizer/plan/planner.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)